<template>
  <div class="todo-header">
    <input
      type="text"
      placeholder="请输入你的任务名称,按回车键确认"
      v-model="title"
      @keyup.enter="addHandler"
    />
  </div>
</template>

<script>
export default {
  props: ["addTodo"],
  data() {
    return {
      title: "",
    };
  },
  methods: {
    addHandler() {
      if (!this.title.trim()) return alert("不能输入空值");
      this.addTodo(this.title);
      this.title = "";
    },
  },
};
</script>

<style scoped lang="less">
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;

  &:focus {
    outline: none;
    border-color: rgba(82, 168, 236, 0.8);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075),
      0 0 8px rgba(82, 168, 236, 0.6);
  }
}
</style>
